Contents  on 28 October '17

NOTE:  These A/CC news pages will update less often for a few days. All discoveries and observing credits will be reported, but we may miss some interim impact risk assessments and undercount NEOCP efforts, and there may be some days without a traffic report for Earth's Busy Neighborhood.

Asteroid/Comet Connection (A/CC) Resources:

The latest A/CC news is available via framed access, RSS news feed RSS news feed, or redirection.

Navigation tips: Use the << and >> arrows on the menus for each regular section (Observers, Risks, etc.) to move to the previous and next day's news for that section. Use the Index menu item to access specific days through a calendar interface. To keep track of what's new each day, watch the Chronology section.

Traffic Report  on 28 October '17

Twelve objects reported inside ten LD

Twelve visitors are reported within ten lunar distances (LD) of our planet today. Nearest is newly announced risk listed intruder 2017 UL6, which is inside the Earth-Moon system, starting the day at 0.80 LD, passing the Moon at 1.14 LD at 0717 UTC and us at 0.155 LD at 1123 UTC, then moving out to 0.89 LD.

Earth passage I D ~Size Distance Today  Notes
0.05 LD Oct. 202017 UJ2 2 m  8.95 to 10.15 LD exits ten LD, intruder, risk
0.15 LD today2017 UL6 1 m  0.15 LD NEW, intruder today, Earth closest 0.155 LD at 1123 UTC,
Moon closest 1.14 LD at 0717 UTC, risk - MPEC
1.38 LD Oct. 242017 UK3 12 m  9.41 to 12.38 LD exits ten LD, Moon buzzer
2.10 LD Oct. 242017 UU2 18 m  8.39 to 10.87 LD exits ten LD
3.99 LD tomorrow2017 UA6 25 m  4.04 from 5.62 LD NEW - MPEC, DOU
4.66 LD Oct. 252017 UE3 28 m  9.13 to 12.18 LD exits ten LD
5.49 LD Oct. 302017 UJ6 17 m  7.23 from 9.10 LD NEW - MPEC, DOU
5.53 LD Oct. 222017 TQ5 11 m  9.00 to 10.07 LD exits ten LD - DOU
5.96 LD yesterday2017 UM5 25 m  6.10 to 7.86 LD NEW - MPEC, DOU, DOU
6.45 LD Oct. 242017 UP5 10 m  9.59 to 11.38 LD NEW, exits ten LD - MPEC
7.46 LD Oct. 222017 US 21 m  8.82 to 9.34 LD risk - DOU, DOU
8.15 LD Oct. 222017 UZ5 16 m  9.79 to 10.42 LD NEW, exits ten LD - MPEC
Approaching
8.66 LD Nov. 17444584 2006 UK 309 m  < 10 LD Nov. 16 - DOU, DOU

This report was updated at 2032 UTC with first follow-up for 2017 UJ6 and 2017 UA6 in today's DOU MPEC along with continuing follow-up for four other objects in the above active traffic table (2017 UM5, 2017 US, 2017 TQ5, and 444584 2006 UK), and four departed objects: 2017 UH5, 2017 UU1, 2017 UU, and 171576 1999 VP11, plus distant 2003 UV11. Your first local flying rocks traffic report was generated at 0614 UTC with new discovery 2017 UL6 (MPEC).
        Yesterday saw the announcement of four close-passing discoveries. Two were active objects still in today's traffic table above: 2017 UJ6 and 2017 UA6, and two that had already departed: 2017 UH6 (MPEC), which passed Earth at 6.20 LD on October 22nd, and risk-listed 2017 UW5 (MPEC), which went by at 1.08 LD on the 21st. That day's DOU carried observations of active objects 2017 UM5 (first follow-up) and risk-listed 2017 US and departed objects 2017 TH4, 2017 TS1, 2017 BW and 171576 1999 VP11, plus distant 2003 UV11.
        The day before yesterday -- Thursday the 26th, there were nine discovery announcements. Three of these were and are active: 2017 UZ5, 2017 UP5, and 2017 UM5, while 2017 UR5 (MPEC) departed yesterday after passing our planet at 3.67 LD on October 21st. The other five discoveries had all already departed. 2017 UL5 (MPEC) flew by at 2.83 LD on the 19th and 2017 UO5 (MPEC) at 4.91 LD the same day, but the other three didn't come closer than 8.15 LD during 19-21 October: 2017 UN5 (MPEC), 2017 UK5 (MPEC), and 2017 UH5 (MPEC). Meanwhile, this day's DOU posted first follow-up for departed 2017 TE4 (9.94 days added to its 4.07-day observing arc) and continuing follow-up for approaching 444584 2006 UK and departed 171576 1999 VP11 as well as distant 2003 UV11.

Reading:  NASA/JPL has a news item about the apparently interstellar asteroidal object that has been redesignated A/2017 U1.



Notes: Ten times the distance to the Moon (ten LD) has no astronomical importance but is a useful boundary for reporting about transient natural objects that approach our planet's gravitational sphere of influence (SOI), which has a radius of about 2.41 LD from Earth's center. This puts a focus on some of the most important and very best NEO observation work, representative of the much larger NEO discovery and tracking effort. "Distant" is used here to describe an object that has come within ten LD since A/CC began these traffic reports (2007) but is not presently so close. Object distances are derived by A/CC from JPL Horizons data. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 28 October '17

The MPC's NEO Confirmation Page has 131 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 131 objects listed. Of these, 65 were "one nighters." So far The Tracking News has counted a total of 146 listings on the NEOCP today.

New MPECs  on 28 October '17

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been thirteen MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2017-U247 - "21:43 UT" - 2017 UO6


MPEC 2017-U246 - "21:39 UT" - 2017 UQ6


MPEC 2017-U245 - "21:35 UT" - 2017 UP6


MPEC 2017-U244 - "21:31 UT" - 2017 UM6


MPEC 2017-U243 - "21:26 UT" - 2017 TW13


MPEC 2017-U242 - "20:52 UT" - 2013 BD74


<< DOU on 28 Oct. '17 >>  MPEC 2017-U241 - "12:06 UT" - Daily Orbit Update


MPEC 2017-U240 - "11:54 UT" - 2009 VT


MPEC 2017-U239 - "03:40 UT" - Comet C/2017 U2 (Fuls)


MPEC 2017-U238 - "03:24 UT" - Comet C/2017 T3 (ATLAS)


MPEC 2017-U237 - "03:04 UT" - Comet P/2017 S9 (Panstarrs)


MPEC 2017-U236 - "02:45 UT" - Comet P/2017 S8 (Panstarrs)


MPEC 2017-U235 - "01:41 UT" - 2017 UL6

Observers  on 28 October '17

A total of 64 observers appear in today's MPECs.

CodeObserver / observatory
L33Ananjev Obs. in Ukraine, 1 in MPEC 2017-U238 -- C/2017 T3
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2017-U236 -- P/2017 S8
T05ATLAS Haleakala in Hawaii, 15 in MPECs 2017-U238, 2017-U241 & 2017-U242 -- C/2017 T3, 2015 KN120, 2013 BD74, 2000 YG29, 87684, 66146, 498548, 242211, 171576, 16657, 162980, 154589, 11405, 10115, 3753
T08ATLAS Mauna Loa in Hawaii, 6 in MPEC 2017-U241 -- 2017 UO, 2017 SL2, 2017 QL18, 2008 AX28, 444584, 333908
C77Bernezzo Obs. in Italy, 2 in MPECs 2017-U238 & 2017-U243 -- 2017 TW13, C/2017 T3
Z84Calar Alto Schmidt in Spain, 1 in MPEC 2017-U238 -- C/2017 T3
160Castelmartini Obs. in Italy, 5 in MPEC 2017-U241 -- 2017 TR1, 2008 MH1, 497176, 338292, 333888
703Catalina Sky Survey (CSS) in Arizona, 44 in MPECs 2017-U236, 2017-U241 & 2017-U242 -- 2017 UO, 2017 TR1, P/2017 S8, 2017 QQ32, 2017 QL18, 2017 OQ68, 2017 HH, 2015 BF4, 2013 BD74, 2012 TV78, 2009 SP171, 2008 MH1, 2008 AX28, 2007 DM41, 2003 UV11, 96590, 87311, 85839, 85628, 503293, 499307, 497176, 496018, 495511, 444584, 338292, 338176, 337228, 333888, 265962, 209924, 19764, 162273, 162011, 159399, 152667, 143404, 142563, 11500, 9950, 8567, 8037, 2212, 1865
V06Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 18 in MPECs 2017-U239, 2017-U241, 2017-U242, 2017-U243, 2017-U244, 2017-U245, 2017-U246 & 2017-U247 -- 2017 US, 2017 UQ6, 2017 UP6, 2017 UO6, 2017 UM6, 2017 UK6, 2017 UJ6, 2017 UJ1, 2017 UH5, 2017 UF6, 2017 UE6, 2017 UB6, C/2017 U2, 2017 TW13, 2017 TG6, 2017 TF1, 2017 RT1, 2013 BD74
107Cavezzo Obs. in Italy, 1 in MPEC 2017-U238 -- C/2017 T3
K51Celado Obs. in Italy, 1 in MPEC 2017-U243 -- 2017 TW13
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 10 in MPEC 2017-U241 -- 2017 UQ4, 2017 UK2, 2017 TV4, 2017 TJ2, 2017 TB4, 2017 SW20, 2017 SR32, 2017 RD15, 2017 PK26, 2017 MC5
G58Chabot Obs. in northern California, 2 in MPEC 2017-U241 -- 2017 UU1, 2017 US
A77Chante-Perdrix Obs. in France, 2 in MPECs 2017-U236 & 2017-U238 -- C/2017 T3, P/2017 S8
970Chelmsford Obs. in England, 1 in MPEC 2017-U238 -- C/2017 T3
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2017-U236 -- P/2017 S8
106Crni Vrh Obs. in Slovenia, 2 in MPECs 2017-U236 & 2017-U238 -- C/2017 T3, P/2017 S8
K87Dettelbach Vineyard Obs. in Germany, 1 in MPEC 2017-U243 -- 2017 TW13
734Farpoint Obs. in Kansas, 2 in MPECs 2017-U239 & 2017-U244 -- 2017 UM6, C/2017 U2
595Farra d'Isonzo Obs. in Italy, 3 in MPECs 2017-U235, 2017-U238 & 2017-U241 -- 2017 UL6, C/2017 T3, 496816
K88GINOP-KHK in Hungary, 4 in MPECs 2017-U236, 2017-U237, 2017-U238 & 2017-U243 -- 2017 TW13, C/2017 T3, P/2017 S9, P/2017 S8
J95Great Shefford Obs. in England, 2 in MPECs 2017-U235 & 2017-U241 -- 2017 UM5, 2017 UL6
G48Harlingten Research Obs. in New Mexico, 1 in MPEC 2017-U238 -- C/2017 T3
511Haute Provence Obs. in Germany, 1 in MPEC 2017-U238 -- C/2017 T3
U695Hidetaka Sato in Japan via iTelescope Obs. Auberry in northern California, 2 in MPECs 2017-U236 & 2017-U237 -- P/2017 S9, P/2017 S8
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2017-U238 -- C/2017 T3
H06*Rolando Ligustri in Italy via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2017-U238 -- C/2017 T3
H06`Erik Bryssinck in Belgium via iTelescope Obs. Mayhill in New Mexico, 2 in MPECs 2017-U236 & 2017-U238 -- C/2017 T3, P/2017 S8
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 2 in MPECs 2017-U238 & 2017-U243 -- 2017 TW13, C/2017 T3
I89'Steven M. Tilley in Louisiana via iTelescope Obs. Nerpio in Spain, 1 in MPEC 2017-U238 -- C/2017 T3
P93JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2017-U238 -- C/2017 T3
585Kiev Comet Station in Ukraine, 2 in MPECs 2017-U236 & 2017-U238 -- C/2017 T3, P/2017 S8
246KLENOT in the Czech Republic, 2 in MPECs 2017-U236 & 2017-U243 -- 2017 TW13, P/2017 S8
V37LCO Fort Davis in Texas, 1 in MPEC 2017-U238 -- C/2017 T3
K38M57 Obs. in Italy, 2 in MPECs 2017-U236 & 2017-U243 -- 2017 TW13, P/2017 S8
H01Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2017-U242, 2017-U244, 2017-U245, 2017-U246 & 2017-U247 -- 2017 UQ6, 2017 UP6, 2017 UO6, 2017 UM6, 2013 BD74
W92MASTER OAFA Obs., 1 in MPEC 2017-U241 -- 2008 AX28
568_Marco Micheli on Mauna Kea in Hawaii, 2 in MPECs 2017-U236 & 2017-U237 -- P/2017 S9, P/2017 S8
711McDonald Obs. in Texas, 1 in MPEC 2017-U247 -- 2017 UO6
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2017-U238 -- C/2017 T3
118Modra Obs. in Slovakia, 1 in MPEC 2017-U236 -- P/2017 S8
900Moriyama Obs. in Japan, 1 in MPEC 2017-U238 -- C/2017 T3
474Mt. John Obs. in New Zealand, 15 in MPECs 2017-U241 & 2017-U245 -- 2017 US, 2017 UP6, 2017 UO2, 2017 UA6, 2017 TV4, 2017 TL4, 2017 TG5, 2017 SW20, 2017 SR32, 2017 SR17, 2017 SO2, 2017 SJ20, 2017 SC14, 2017 KT4, 2011 CX7
G96Mt. Lemmon Survey (MLS) in Arizona, 33 in MPECs 2017-U235, 2017-U236, 2017-U239, 2017-U241, 2017-U243, 2017-U244, 2017-U245, 2017-U246 & 2017-U247 -- 2017 UQ6, 2017 UQ, 2017 UP6, 2017 UO6, 2017 UM6, 2017 UL6, 2017 UC, C/2017 U2, 2017 TW13, 2017 TR1, 2017 SY11, P/2017 S8, 2017 QL18, 2012 WL4, 2011 VQ5, 2011 QH21, 2009 SP171, 2007 DM41, 2006 VW2, 2002 RN38, 2001 UF18, 498143, 476187, 471956, 337228, 29075, 26663, 20086, 19764, 164211, 164207, 142563, 2212
K74Muensterschwarzach Obs. in Germany, 1 in MPEC 2017-U238 -- C/2017 T3
J69North Obs. in England, 3 in MPEC 2017-U241 -- 2017 UK6, 2017 UA6, 496816
Z80Northolt Branch Obs. in England, 2 in MPECs 2017-U238 & 2017-U241 -- 2017 UK6, C/2017 T3
J43Oukaimeden Obs. in Morocco, 3 in MPEC 2017-U241 -- 2017 HH, 495511, 11500
I61Ourense Obs. in Spain, 1 in MPEC 2017-U241 -- 2003 UV11
F51Pan-STARRS 1 (PS1) in Hawaii, 27 in MPECs 2017-U236, 2017-U237, 2017-U238, 2017-U239, 2017-U241, 2017-U242 & 2017-U243 -- 2017 UC, C/2017 U2, 2017 TW13, C/2017 T3, 2017 SY11, P/2017 S9, P/2017 S8, 2017 PF, 2017 PB27, 2017 OQ68, 2017 HH, 2016 VO1, 2015 UM67, 2013 BD74, 2007 VO243, 2007 DM41, 52760, 499307, 496816, 495511, 475967, 448628, 329291, 26663, 152667, 112221, 8037
K63Pascoli Obs. in Italy, 3 in MPECs 2017-U236, 2017-U238 & 2017-U243 -- 2017 TW13, C/2017 T3, P/2017 S8
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 2 in MPECs 2017-U238 & 2017-U243 -- 2017 TW13, C/2017 T3
W98Polonia Obs. in Chile, 2 in MPEC 2017-U241 -- 30825, 143404
D29Purple Mtn. Obs. Xuyi Station in China, 6 in MPEC 2017-U241 -- 2013 YY13, 90075, 220909, 209924, 16834, 11500
K61Rokycany Obs. in the Czech Republic, 1 in MPEC 2017-U238 -- C/2017 T3
104San Marcello Pistoiese Obs. in Italy, 3 in MPECs 2017-U236, 2017-U238 & 2017-U243 -- 2017 TW13, C/2017 T3, P/2017 S8
H36Sandlot Obs. in Kansas, 1 in MPEC 2017-U243 -- 2017 TW13
G40#J.L. Tuten in Arkansas via Slooh.com Canary Islands Obs. in the Canary Islands, 2 in MPECs 2017-U236 & 2017-U243 -- 2017 TW13, P/2017 S8
G409B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 3 in MPECs 2017-U236, 2017-U238 & 2017-U243 -- 2017 TW13, C/2017 T3, P/2017 S8
691Spacewatch 0.9m telescope in Arizona, 22 in MPECs 2017-U236, 2017-U237, 2017-U239, 2017-U241, 2017-U242, 2017-U243, 2017-U244 & 2017-U247 -- 2017 UO6, 2017 UM6, C/2017 U2, 2017 TZ4, 2017 TZ3, 2017 TX3, 2017 TW3, 2017 TW13, 2017 TQ6, 2017 TH6, 2017 TF1, 2017 SX11, 2017 SL14, P/2017 S9, P/2017 S8, 2017 PB27, 2013 UM9, 2013 BD74, 2012 PN28, 2001 VC2, 2000 WK107, 416584
291Spacewatch 1.8m telescope in Arizona, 6 in MPECs 2017-U236, 2017-U237 & 2017-U241 -- 2017 UZ, 2017 UY4, 2017 UR4, P/2017 S9, P/2017 S8, 2017 NH
W34Squirrel Valley Obs. in North Carolina, 2 in MPEC 2017-U241 -- 2003 UV11, 162998
I52Steward Obs. Mt. Lemmon Station in Arizona, 16 in MPECs 2017-U236, 2017-U241, 2017-U242, 2017-U243, 2017-U244, 2017-U245 & 2017-U247 -- 2017 UU1, 2017 UU, 2017 UT, 2017 UP6, 2017 UO6, 2017 UM6, 2017 UH, 2017 TW4, 2017 TW13, 2017 TO5, 2017 TK6, 2017 TG6, 2017 TC1, 2017 TB5, P/2017 S8, 2013 BD74
A71Stixendorf Obs. in Austria, 2 in MPECs 2017-U236 & 2017-U243 -- 2017 TW13, P/2017 S8
J22Tacande Obs. in the Canary Islands, 1 in MPEC 2017-U238 -- C/2017 T3
926Tenagra II Obs. in Arizona, 13 in MPECs 2017-U236, 2017-U238, 2017-U239, 2017-U240, 2017-U241, 2017-U242, 2017-U244, 2017-U245 & 2017-U247 -- 2017 US, 2017 UP6, 2017 UO6, 2017 UO2, 2017 UM6, 2017 UG3, C/2017 U2, 2017 TW4, 2017 TQ5, C/2017 T3, P/2017 S8, 2013 BD74, 2009 VT
T12UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2017-U241 -- 2017 FD3
C42Xingming Obs. in China, 1 in MPEC 2017-U238 -- C/2017 T3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 October '17

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2358 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Both also post impact solutions beyond 100 years for a few special objects.
For the latest official risk assessments, and for explanations of the terminology, see the NASA/JPL Sentry and NEODyS CLOMON2 risk pages.
0000NNN000

Object

Risk
Monitor
When
Noted
UTC
0000T0000
Year
Range

VI
#
000NN00
Prob
Cum
T0000
PS
Cum
T0000
PS
Max

T
S


Notes for Today's Latest Risk Assessments
2017 UL6JPL Sentry04412058-2106234.703432e-05-7.87-8.380JPL: Computed at 21:11 Oct. 27th Pacific time based on 15 observations spanning .77410 days (2017-Oct-27.2341 to 2017-Oct-28.008202). Diameter approximately 0.001 km. from weighted mean H=32.03.
2017 UZJPL Sentry15542113-211316.929e-08-7.88-7.880JPL: Computed at 07:50 today Pacific time based on 20 observations spanning 12.132 days (2017-Oct-16.23157 to 2017-Oct-28.3634). Diameter approximately 0.021 km. from weighted mean H=26.00.
2017 USJPL Sentry18242070-2117150.000614771495-4.11-4.490JPL: Computed at 08:56 today Pacific time based on 114 observations spanning 11.864 days (2017-Oct-16.34512 to 2017-Oct-28.20876). Diameter approximately 0.021 km. from weighted mean H=26.01.
2014 HR197JPL Sentry04412017-21121988.1556e-08-7.06-7.890JPL: Computed at 10:48 April 9th Pacific time based on 15 observations spanning .95899 days (2014-Apr-24.15618 to 2014-Apr-25.11517). Diameter approximately 0.014 km. from weighted mean H=26.93.

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale (next 100 years)

An impact solution, also known as a "virtual impactor" (VI), is not a prediction but rather a possibility derived from a variant orbit calculation that cannot be eliminated yet based on the existing data. Elimination can come quickly with just a little further observation or may take weeks or months, sometimes years. Once superceded or eliminated, a former impact solution has zero relevance to an object's risk. See Jon Giorgini's "Understanding Risk Pages" to learn more.

Chronology  on 28 October '17

Times are UTC for when items were noted or added by The Tracking News.

2253Grabbed MPEC 2017-U243 - 2017 TW13 - see above
Grabbed MPEC 2017-U244 - 2017 UM6 - see above
Grabbed MPEC 2017-U245 - 2017 UP6 - see above
Grabbed MPEC 2017-U246 - 2017 UQ6 - see above
Grabbed MPEC 2017-U247 - 2017 UO6 - see above
2126Grabbed MPEC 2017-U242 - 2013 BD74 - see above
2032Updated Traffic Report
1824Noted that JPL Sentry has updated its 2017 US risk assessment - see above
1554Noted that JPL Sentry has updated its 2017 UZ risk assessment - see above
Grabbed MPEC 2017-U240 - 2009 VT - see above
Grabbed MPEC 2017-U241 - Daily Orbit Update - see above
0441Noted that JPL Sentry has updated its 2014 HR197 risk assessment - see above
Noted that JPL Sentry has posted 2017 UL6 as an impact risk - see above
Grabbed MPEC 2017-U239 - Comet C/2017 U2 (Fuls) - see above
0332Grabbed MPEC 2017-U235 - 2017 UL6 - see above
Grabbed MPEC 2017-U236 - Comet P/2017 S8 (Panstarrs) - see above
Grabbed MPEC 2017-U237 - Comet P/2017 S9 (Panstarrs) - see above
Grabbed MPEC 2017-U238 - Comet C/2017 T3 (ATLAS) - see above